No, it really isn't. Putin and other Russian leaders, and
Russian government owned media have both talked about
restoring the "Russian Empire." He even pushed the idea in his
interview with Tucker Carlson, if you go back and listen, as his justification for invading Ukraine. If you listen to what Putin and his media is saying, it is clear they want to restore the Russian Empire which includes other countries, and portions of other countries, and will invade to restore Russia to greatness.
And if you don't like my sources, you can find plenty of others by doing a simple Internet search. One I found even talked of how Putin was trying to do it without invading countries,
prior to the war in Ukraine, largely by economic and similar means -- with other articles, more recent, explaining how Putin ended up invading because Ukraine was forging ties with the West, not with Russia.